Valve cutting and reseating mechanism.



J. SHANNON.

VALVE CUTTING AND RESEATING MECHANISM.

APPLICATION FILED SEPT. 10, 1913.

1,099,311 6, Patented June 9,1914.

Witnesses Inventor,

Attorneys,

JOHN SHANNON, F STONINGTON,

CONNECTICUT.

VALVE CUTTING AND RESEATING MECHANISM.

Specification of Letters Patent.

Patented June a, 1914.

Application filed September 10, 1913. Serial N 0. 789,158.

To all whom it may concern:

Be it known that I, JOHN SHANNON, a

citizen of the United States, residing at Stonington, in the county of New London and State of Connecticut, have invented a new and useful Valve Cutting and Reseat ing Mechanism, of which the following is a specification.

This invention relates to a valve reseating and cutting mechanism whereby the head of the puppet valve of an internal combustion engine may be seated and trued to the valve seat.

A further object of the invention is to provide a portable apparatus which may be carried in an automobile and which may instantly be called into service to cut and true a valve so as to properly seat and correct the otherwise faulty workings of an internal combustion engine.

Another object of the present invention is provide a mechanism including opposite] y disposed cutting knives which may be set at any required angle and at any distance from a central point so as to regulate the depth of cut of the puppet valve, to further provide spring controlled means bearin downward upon the valve whereby the va ve is forcibly held in contact with the cutting knives and the pressure of which may be nicely regulated.

With the foregoing and other objects in view which .will appear as the description proceeds the inventlon resides in the combination and arrangement of parts and in the details of construction hereinafter described and. claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawings accompanying this specification and forming a part thereof, the preferable form of my invention is illustrated, in which:

Figure 1 is a side view in elevation of my improved valve grindingl and cutting mechanism with a portion t ereof broken away illustrating the bushingvwhich rotatably engages the valve stem. ig. 2 is a front view thereof.

Referring to the drawings, in which similar reference numerals designate corresponding parts throughout the several views, a frame or body portion is provided and includes a base at the front portion of which plate 5 as illustrated in Fig. 2, includes the circular central portion from which extend the radial arms 66 and 8-8, it being by one of the latter that the front plate is connected to the base 4.

Extending rearwardly from the front plate 5 and approximately central thereof, is the sleeve 9 which is connected to the base 4 by means of the web 10. The sleeve 9 as indicated by its name is hollow and receives a bushing 11 therethrough and which bushing is provided with an aperture 12 extending centrally therethrough which is of a size so as to receive the valve stem therein and effect a snug fit therewith in order to maintain the valve true whileit is being rotated for the grinding and cutting thereof. A set screw 13 extends through the side wall of the sleeve and is adapted to engage and rlgldly secure the bushing within the sleeve. In this connection it m1ght be mentioned that a number of the bushings 11 are to be provided varying in sizes so as to accommodatevalve stems of different diameters. The front plate is provided with a bore 14: extending therethrough which communicates with and is in alinement with the sleeve borc so as to receive the bushing partially therethrough. The front extremity of the bore 14 is enlarged as illustrated in Fig. 1 allowing for the enlargement of the valve at the uncture of the valve head and valve stem.

The radially extending arms 66 and 8-8 are provided with forwardly extending lugs so that the cutting knives in holding a plate which are secured thereto will be spaced a distance beyond the outer surface of the front plate. The upper and lower lugs 15 and 16 are provided with the threaded apertures 17 for the engagement of the stud bolts 18 and 19 therewith. The holding plate 20 is provided with an aperture 21 extending therethrough and of somewhat larger diameter than the shank of the bolt 18 which it receives therein, thus allowing for a certain amount of play between the holding plate and the bolt 18. A compression spring 22 is provided upon the shank of the lower bolt 18 and extends between the head thereof and the outer surface of the holding plate 20, so that a resilient force will be exerted upon the holding plate 20 forcing the same into contact with the lug 16, and allowing for the pressure which may be varied by adjustment of the elongated is the outstanding front iiafe lower bolt 18. The remote end of the holding plate is provided with a transverse slot 23 extending therethrough and for a limited distance thereacross. The slot 23 is adapted to fit beneath the head of the upper bolt 18 and to be forced into contact with the lug 15 thereby. The threaded aperture 24' extends through the holding plate 20 .and

' threadedly receives the wing bolt 25 therein, which wing bolt rests upon and contacts with the extremity of the valve when the same is positioned in contact with the knives and adapted to be cut thereby.

The laterally extending lugs 16 are provided with a number o'fbpeiiings which extend therein whereby tool clamping plates engage the latter. Thecuttin tools as will be readily apparent from a re erence to Fig. 2, are provided with beveled cutting ends which conform accurately to the bevel of the valve head and valve seat.

In order to forcibly rotate the valve stem and therefore the valve head, which latter being in contact with the cutting knives will require some little force, the handle illustrated at the left of Fig. 1 is provided and includes a split head 30 with suitable tightening bolts 31 extending therethrough whereby the said head may be rigidly secured to the valve stem and effect a rotation thereof and due to the fact that the valve stems are usually case hardened there will be little danger of the valve stem being dis figured. An arm 32 projects from the head 30 and at the lower extremity is secured a handle 33 which may be gripped for the manual rotation of the valve.

The foregoing described construction provides for a portable device which may be easily carried about to be used in-connection with internal combustion engines and more particularly to those which include valves of the puppet type. These valves as is well known are subject to deposits of crystallized carbon upon their contacting faces which spoils the seating qualities of the valve and unless removed, result in the skipping of the engine and consequent loss of power and improper workings thereof. The ordinary method of inserting ground glass or allied abrasive substance beneath the valve head and grindin the same 11 on the seat, does not remove t e deposits 0 carbon for which urpose the present device has been devised.

he valve head when becoming pitted or deposits of carbon being formed thereon, the

valve is removed and'positioned as illus trated in Fig. 1, withthe stem thereof disposed within the bushing valve beyond which the end extends andlto which the handle is secured. The valve being so osi- ,tioned, the holding plate 20 is rotated rom the dotted position illustrated in Fig. 2 to the one of full lines and clamped into plate by the upper bolt. The wing bolt 25 is then screwed into engagement with the top ofthe valve head and the pressure of the same regulated by forcing the holding plate outwardly and against the compression spring 22. In this connection it might be noted that the upper extremity of the holding plate 20 Fig. 1, is illustrated as being slightly spaced from the upper lug 8 so as to allow for the slight movement thereof. The

handle is secured to the valvestem and the rotation of the same brings the valve head into" forcible contact with the cutting knives or tool 28 with the result that a fine shaving will'be removedfrom the seating portion of the valve head and all, deposits of carbon or imperfections in the valve head will thereby be removed.

Having thusfully described my invention, what I'claim is' 1. In a valve-truing mechanism, the coin:

bination of a front plate provided with a bore extending therethrough and'adapted to rotatably receive a valve stem therein, a

cutting knife ad lustably and rigidly secured to said cutting p atejuxtaposed to said bore,

a holding plate resiliently secured to the said front plate, means-extending through said holding plate engagin th valveihead and adapted to force the same into contact with said cutting knife, and means for holding said valve stem true during the rotations thereof. I

2. In a mechanism of. the class described, the combination of a body ortion including a front plate provided with an aperture extending therethrough, a sleeve projecting rearwardly from the said plate and communicating with said plate aperture, knife holding lugs carried by said plate, a cutting knife adjustably secured thereto, said plate and sleeve adapted to rotatably secure a valve of the puppet type therein, a holding plate rotatably and resiliently secured to the body portion in front of said first menthe valvehead thereof projecting in front of said late, said front late provided with upstan ing ln s at the side thereof, cutting knives ad usta ly secured to the upstandin lugs and arranged to contact with the sai valve head, said front 1plate provided with outstanding lugs at t e top and bottom thereof, a plate rotatably and resiliently secured to one of said lugs, locking means secured to the other of said lugs adapted to hold said holding plate in locked position extending above the valve head, means extending through said holding plate ada ted to contact with the said valve head to orce the said valve head into yielding contact with the said cutting knives, and means for regulating the pressure aid force of contact between said valve head and Said cutting knives.

4. In a valve truing and seatingcutter, thecombination of a body ortion including a front plate provided with an aperture extending therethrough and with a sleeve projecting outwardly in alinement with the said aperture, said sleeve and aperture adapted to rotatably receive a valve of the puppet type therein, said front plate provided with outstanding lugs at the sides thereof said lugs provided with means for adjustably engaging cutting tools and holding the same rigidly secured thereto, cutting knives secured to said lugs and held a distance above the said plate, said plate provided with out standing lugs at the upper and lower portion thereof, a holding plate rotatably and resiliently secured to one of said lugs, means upon the other of said lugs adapted to hold said plate in a locked position above said plate aperture, means extendin through said holding plate above said ront aperture ada ted to contact with the valve head and resiliently force the same into contact with said cutting knives, means for varying the force of contact between said plate a valve head and cutting knives, and means securable to the projecting end of said valve stem for the manual rotation thereof.

5. In a valve seating and cutting mechanism, the combination of a frame including a base and an upstanding front plate carrie thereby, a rearwardly extending sleeve carried by said front plate and a web extending between said sleeve and said base for the bracing thereof, said front plate provided with an aperture extending therethrough communicating with the bore of said sleeve, means insertible within said sleeve for rotatably securin a valve stem therein with the valve head t ereof rejecting in front of said front plate, said front plate provided with outstanding lu s, cutting knives secured to said outstan ing lu and spaced a distance from said plate, sai plate provided with a. second pair of outstanding lugs, a holding plate resiliently and rotatably secured to said lugs and extending above the said valve head, and a wing bolt extending through said holdin plate and contacting with the said valve ead adapted to resiliently force the same into contact with the said cutting knives.

6. A valve cutting and seating mechanism comprising a front late rovlded with a bore extending theret roug and adapted to rotatably receive a valve stem herein, a cuttin knife adjustably and rigi ly secured to sm plate, a holding plate resiliently secured to said front plate, means extending through said holding (plate adapted to engage a valve head an to force the same into contact with said cutting knife.

In testimony that I. claim the foregoing as my own, I have hereto afiixed my si ns ture in the presence of two witnesses.

JOHN SHANNON.

Witnesses:

HERMAN J. Honour-non, Erlms B. HmoKLa'Y. 

